function compareVersion(v1, v2) {
  v1 = v1.split('.')
  v2 = v2.split('.')
  const len = Math.max(v1.length, v2.length)

  while (v1.length < len) {
    v1.push('0')
  }
  while (v2.length < len) {
    v2.push('0')
  }

  for (let i = 0; i < len; i++) {
    const num1 = parseInt(v1[i])
    const num2 = parseInt(v2[i])

    if (num1 > num2) {
      return 1
    } else if (num1 < num2) {
      return -1
    }
  }

  return 0
}

function isCanOpenSysBlueSetting() {
   let minVer = '2.20.1';
   let sys = wx.getSystemInfoSync();
   let version = sys.SDKVersion;
   let phoneOs = sys.platform;
   if(phoneOs == 'ios') {
     return false;
   }
   let rst = compareVersion(version, minVer);
   return rst >= 0;
}

function isCanGetSystemSetting(){
  let minVer = '2.20.1';
   let sys = wx.getSystemInfoSync();
   let version = sys.SDKVersion;   
   let rst = compareVersion(version, minVer);
   return rst >= 0;
}

module.exports.isCanOpenSysBlueSetting = isCanOpenSysBlueSetting
exports.isCanGetSystemSetting = isCanGetSystemSetting